Water-tube steam-boiler



(m1910631.)-v y 3 Sheets-sheet 1. L. DAVIS. WATER TUBE STEAM EOILEE.

-Patented June 26, 1894.

LWMI-:5555

(No Model.) 3 Sheets-Sheet 2.A

VL. D. DAVIS. WATER TUBE STEAM BOILBR.

No. 521,850. Patented June 26, 1894.

NNNNNNNNNNNNN u.

(N Model.) 3 sheets-sheen 3. L. D. DAVIS. WATEE TUBE STEAM BOILEE.

Patented Jline 26., 1894,

WIUTEESEE f leammzjws EL wm,

LEONARD D. DAVIS, OF ERIE, PENNSYLVANIA.

, WATER-TU BE STEAM-BOILER.

SPECIFICATION forming part of Letters Patent N o. 521,850, datedhJ'uneQG, 18.94,. Application filed May 22, 1893- Serial No. 475,170. (No model.)

To a/Z whom t may concern.

103e it known that I, LEONARD D. DAvis, a citizen of the United States, residing at the city of Erie, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Water-Tube Steam- Boilers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to whichit appertains to make and.

boiler, on the line y, y, in Fig. 1, looking in` the direction of the arrow. Fig. 8. is a detail View of a section of my improved boiler, illustrating the arrangement of the tubes forming the iiues thereof. Fig. 4. is a sectional detail view of the saine on the line z, z, looking in the direction of the arrow. Fig. 5. is a detail view illustrating the arrangement of the tubes. Fig. 6. is a kdetail view illustrating the arrangement of the large pipes of the boiler. Fig. '7. is a detail View of a modified construction of the tubes of my improved boiler.

The principal objects of my invention in water tube steam boilers, hereinafter described, are to so combine the water tubes that they form a series of iiues through which the products of combustion and the heat from the fire-box must pass on their way to the smoke stack, thereby insuring an equal circulation thereof throughout all of the heating surface of the boiler, and also, in connecting the tubes forming these lines to suitable hori- .zontal and vertical pipes or drums, so asl to insure adequate circulation of the water therein.

The other features of my invention appear hereinafter in the specification andclaiins.

In the construction of my improved watertube boiler illustrated in the accompanying drawings, A Aare the side walls, B the front, B the rear, and C the top of the boiler setting; C the aperture for the smoke stack; D the grate bars; J the tire-box and D the ash pit wall, all of which features are of ordinaryl construction.

Directly at the rear B' of the boiler set ting, I preferably place an upright pipe or drum E, and in the lower portion of this pipe or drum E, IV secure a series of horizontal pipes F,-F and F2 which project forward through the rear B of the boiler settingifar enough, so that the forward ends thereof extend to and rest upon the top of the ash pit wall D; these pipes inside of the rear B of the boiler setting being parallel with each other, as illustrated in Figs. 2, 3, and 6. In the upper portion of the drum E, I also secure a like series of horizontal pipes G, G and G2,which, likewise project forward through the rear B of the'fboiler setting, parallel to each r other nearly to the forward end B of the boiler setting, the number of the pipes G, G and G2 being the same as that of the pipes F, F and F2 above referred to. i

I connect the pipes F and G, F and G', and

.F2v and G2 together by means of tubes, preferably a-s follows: In the pipe F, I secure arow of water tubes a', b, c, c', f', d, e, e', h', g ,i, 7c and j, all of which are secured in the pipe F, and except the tube a', and extend upward therefrom a distance, of say two feet to bends E therein, from this point the tubes b, c, c d, e, e g, t', t" and j extend forward and upward at an incline, of say fifteen degrees, one above the other in close contact for a distance of say four feet to bends H therein, so as to form substantially a solid vertical wall 4of tubes from the bends E to the bends II therein; at the bends E the tubes f', h and 7c are also bent laterally to the right so as to bring them atthe sides of and parallel with the tubes d,g and j until the bends H are reached when they are bent back to the left again to their normal positions, and from the bends H the tubes b, c, c f d, e, e h g,z',1 lo and j extend upward vertically until they reachthe pipe G in which they are secured. The tube o. is secured in the pipe F at the rear of the tube b and is then bent forward and sidewise tothe right until it is brought to the right IOO hand side of the tube b and in close contact therewith, from which point it extends upward to the bend E', and from thence at the right hand side of the tube Z) to the bend II and from this point where the tube l) bends upward; the tube a extends forward and upward at the same inclination at therighthand side of all of the tubes above described until it reaches a point opposite the forward end of the pipe G where it is bent laterally and upwardly to the pipe G and secured therein.

In the pipe F Isecure arow of water tubes a' b, a, c, c' f,f d, @,e 71 hg, z', t" 76,715 andj, all of which are secured in the pipes F', and

except the tubes a and a, extend upward therefrom a distance of say two feet to bends E therein, from this point the tubes 12,0, c' d, e, e' g, c', i" and j, extend forward and upward at an incline of say fifteen degrees one above the other in close contact for a distance of say four feet to bends H therein, so as to form substantially a solid vertical wall of tubes from the bends F/ to the bends II therein; at the bends E the tubes f, 7L and 7c are bent laterally to the left, and the tubes f 7L and 7c' to the right, as illustrated in Figs. 4 and 5,A

so as to bring them at the sides and parallel with and in contact with the sides of the tubes cl, g and j, until the bends H are reached, so as to form substantially solid horizontally inclined walls of tubes from the bends E to` the bends II therein, as illustrated in Figs. 2 and 4; at the bends H the tubesf, h and k are bent back to the right, and the tubes f 72, and k back'to the left again, to their normal positions, as illustrated in Fig. 5, and from the bends II, the tubes b, c, c'f,f d,e, e h, h' g, z', z" k, 7c and j, extend upward and vertically until they reach the pipes G in which they are secured. The tubes ci are preferably secured in the pipes F at the rear of the tubes b, and the tubes a in front of the tubes b; the tubes o.' are then bent forward and to the right, and the tubes a rearward and to the left of the tubes b, from which point they extend upward at each side of and in contact with the sides of the tubes b to the bends E, and from thence in contact with the sides of the tube b to the bends II and from this point where the tubes b bend upward;`

the tubes a and a extend forward and upward at the same inclination, at the right and left hand sides of the tubes entering the pipes G until they reach nearly to the forward ends of the pipes G where they are bent laterally and upwardly to the pipes G and secured therein.

It will be seen by this arrangement of the tubes a, b and a', I form therewith a solid wall of tubes extending from near their junction with the pipes Fand F'upward and i forward to the bends I-I in the pipes, as illusinbefore described, except that the tubes auf, h and lo are used, instead of the tubes af h and 7a', which tubes are bent toward the left, in connecting the pipes F2 and G2 the same as the like lettered tubes are, in connecting the intermediate pipes F and G'. It will be observed that by this arrangement of the tubes, I form therewith inclined rectangular iiues I, extending from the bends E of the tubes to the bends H thereof. All of the heat and products of combustion from the fire-box .l passing freely between the vertical portions of the tubes below the bends E thereof, and thence up into and through the iiues I; and from the upperendsof the fines I, at the bends H of said tubes, up between the upright portions of the tubes above said bends I-I to the smoke stack opening C', thus insuring an equitable distribution of the heat to all of the water-tubes hereinbefore described.

In the upright pipe or drum E, I secure a perforated disk K, at or near the normal water line of the boiler, and opposite the outlets L of the pipes G, G G2, I secure an annular downwardly projecting defiector M the lower edge of which is provided with serrations m. The lower portion of the vertical pipe or drum E is divided by a transverse diaphragm N having inlet openings 'n therein, a semi-disk O is secured between the sides of the shell of the pipe or drum E and to the top of the diaphragm N which diaphragm N and semi-disk O form with the sides and bottom of the shell of the pipe or drum E, a chamber P, surrounding the inlets p of the pipes F, F and F2. I also securein the semidisk O a short upright pipe o which operates to equalize the iiow of the water in the chamber P. To the edge of the semi-disk O I secure an apron or shield R which extends downwardly at some distance over the diaphragm N below the lowermost of the openings 'n in said diaphragm. The feed pipe S, I preferably insert through the shell of the pipe or drum E near the bottom thereof, from which' point it extends upward about two thirds of the way to the normal water line of the boiler. By this method of constructionI am enabled to utilize the lower portion of the pipe or drum E, as a separating chamber, in which the impurities in the water separated by the action of the heat, settle to the bottom by gravity where they may be blown off by means of an ordinary blow off cock (not shown); I also provide the chamber P with a blow od cock T which Acan be used occasionally to blow olf any impurities which may have passed into the chamber P through the openings n.

In operation the water from the chamberP passes into the pipes F; F F2 and then through the tubes hereinbefore described into the pipes G, G G2, and back against the deiiector M in the upper portion of the pipe or drum E where the steam rises to the top of the pipe or drum E, while the water passes down through the screen K, and as the temperature IOO IIO

l to again traverse the path above described.

The traverse and action of thefire and heat among the tubes and through the flues Ihaving been hereinbefore fully described, furtherreference thereto is deemed unnecessary.

In Fig. 7, I show a modified construction of ,the water tubes of my improved boiler; in

this construction, the tubes Z and Z are {iattened horizontally, while the tubes r which form the vertical walls of the flues I of the boiler are flattened vertically; in this manner, I am enabled to use a less number of water` tubes in forming the flues; in all other respects, however this construction is substantially the same as that hereinbefore described.

I have thus'shown and describeda convenient mechanism for utilizing my invention,

y but I do not desire to limit myself` to the exact construction shown and described, therefore, f

Vhat I claim as new, and desire to secure by Letters Patent of the United States, is-

l. The combination in a water tube steam boiler, of water tubes extending from headers in the rear of the fire box to headers at the front of the boiler above the fire box, and a series of flues, one above another, extending from the rear toward the front, of the boiler, the walls of which consist of the cen'- tral portions of said water tubes, through which iues the heat and products of combustion pass on their way from lthe rear-of the fire box of said boiler to the smoke stack, substantially as set forth.

2. The combination in a Water-tube steamboiler, of inclined water-tubes, and a flue or iiues, inclined upward from the rear toward the front of the boiler, the walls of which con- Y sist of the central portions of said inclined water-tubes placed in close contact with each other, through which, flue or hues the heat and productsof combustion pass on their way from the rear of the hre-box of said boiler to the smoke-stack, substantially as set forth.

3. .T he combination ina water-tube steamboiler, of water-tubes curved near their ends and having their central portions inclined,

4and a series of flues, one above another inclined upward from the rear toward the front of the boiler, the walls of which consist of the i central portions of said inclined water-tubes,

through which fines the heat and products of combustion pass on' their way from the rear of the fire-box of the boiler to the smoke-V stack, substantially as set forth.

4. .The combination in a water-tube steamboiler, of Water-tubes curved near their ends and connected into'horizontal. header pipes and having their central vportions inclined upward from the rear toward the front of the boiler, with inclined tlues, the walls of which consist of the central inclined portions of saidwater-tubes, through which flues the heat and products of combustion pass on their way consist of inclined water-tubes placed in close y contact with each other, and each succeeding [lue projecting rearward beyond the hue immediately below it far enough to form theinlet thereto, so as to insure each iiue receiving its share of the heat and products of combustion, substantially as setr forth.

` 6. The combination in a water-tube steamvboiler, of a group of water-tubes curved near the ends thereof and secured in header pipes communicating with down flow pipes or drums, the central portions of which water-tubes between the curves therein being closelyin c ontact with each other and inclined upward from the rear toward the front of the boiler, so as to form an inclined flue or iiues between the curves in said water-tubes,` the walls of which flue or iiues consist of the central inclined portions of said water-tubes, substantially as and for the purposes set forth.

7. The comloination in a water-tube steamboiler, of a ire box at 'the front of the boiler, header pipes extending rearwardly from the rear of the fire-box, water-tubes inserted in said header pipes and extending upward some distance substantially parallel to each other,

so that the heat and products of combustion -pass from the rear of the fire-box freely bepipes by means whereof said water-tubes are brought into contact with each other in tiers, one above another horizontally inclined from 'the said bends upward toward the front of the boiler, a second set of bends in said watertubes above the fire-box and near the front of the boiler whereby said Water-tubes are again separated from each other, so as to allow the heat and products of combustion to pass between them, and header pipes secured to the upper ends Yof said water-tubes, substantially as and for the purpose set forth.

8. The combination in a water-tubesteamboiler, of water-tubes formed into a group of flues inclined upward from the rear toward thefront of the boiler, the'vertical and horizontal walls of which fines consist of the cen- `lral portions of the water-tubes placed in close contact with each other, so as to form a rectangular group of flues extending from the rear toward the front .of the boiler substantiallyas set forth.

9. The combination in a water-tube steamlIO Izo:

necting said pipes at the lower and upper parts of the boiler, with a vertical pipe or drum connecting with the ends of said pipes at the lower and upper parts of the boiler, and aserni-disk O and a diaphragm M in the lower part of said vertical pipe or drum, forining a chamber around the inlets of the pipes at the lower part of the boiler, substantially as and for the purpose set forth.

l0. The combination in a water-tube steamboiler, of horizontal pipes F, F duc., at the lower part of the boilerand horizontal pipes as G, G rive., at the upper part of said boiler, Water-tubes curved near their ends and having the central portions thereof inclined couneoting said pipes at the lower and upper parts of the boiler, with a Vertical pipe or around the outlets of the pipes at the lower part of the boiler, substantially as and for the purpose set forth.

In testimony whereof I aiiix my signature in presence of two witnesses.

LEONARD D. DAVIS.

lVitnesses:

H. J. CURTZE, F. J. BAssETT.

.vertical pipe or drum, 'forming a chamber I 

